Charcoal and router: what they have in common

1. Step 1. Charcoal — is material for — Gunpowder. Gunpowder is a mix of saltpetre, sulphur and charcoal.
2. Step 2. Gunpowder — is used in — Anti-aircraft gun. Gunpowder propels the projectile.
3. Step 3. Anti-aircraft gun — uses — Radar. Radar guidance.
4. Step 4. Radar — has part — Antenna. An antenna emits and receives.
5. Step 5. Antenna — is part of — Router. Antennas.

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